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引言印度西北部拉达克地区印度-藏布江缝合带北侧出露几个平行的花岗岩带。这些花岗岩带可追溯到巴基斯坦的科希斯坦和西藏拉萨地块相接的地区。拉达克-喀拉昆仑地区两个主要花岗岩带是南部的拉达克花岗杂岩体和北部的喀拉昆仑杂岩体。尽管对拉达克岩基源区存在分歧,但拉达克花岗杂岩体是代表了晚白垩至始新世新特提斯洋壳俯冲有关的钙碱性侵入作用。喀拉昆仑岩基恰好与拉达克岩基平行,同位素年龄为侏罗纪至中新世,意味着侵入活动是复杂的。这些杂岩体问题的解决有助于推断印度-亚洲碰撞带的构造活动史,也有助于了解
INTRODUCTION Several parallel granite belts are exposed to the north of the India-Tibet joint in the Ladakh region of northwestern India. These granite belts can be traced back to the areas of Koh Sistan in Pakistan and the Lhasa massif in Tibet. The two main granitic belts in the Ladakh-Karakoram region are the southern Ladakh granodiorite complex and the northern Karakorum complex. Despite the differences in the base areas of the Ladakh rock base, the Ladakh granodiorite body represents the calc-alkaline intrusions associated with the subduction of the Neo-Tethys oceanic crust from the Late Cretaceous to the Eocene. The Karakorum basement is exactly parallel to the Ladakh basement and the isotopic age is from Jurassic to the Miocene, which means that intrusion activity is complex. The resolution of these complex bodies helps to infer the history of tectonic activity in the Indian-Asian collision zone and also helps to understand